Block a range of IP addresses not belong to Terraform Cloud of AWS EC2 Security group

[lens0021]

Currently AWS EC2 Security group ingress for port 4646 is allowed by "0.0.0.0/0" and "::/0"

Setting just for Terraform cloud IP ranges results in a timeout. (run: https://app.terraform.io/app/femiwiki/workspaces/nomad/runs/run-n42BTGVN9rLkC53p)

Error: error applying jobspec: Put "http://18.181.17.14:4646/v1/jobs": dial tcp 18.181.17.14:4646: i/o timeout

  on nomad.tf line 4, in resource "nomad_job" "plugin-ebs-controller":
   4: resource "nomad_job" "plugin-ebs-controller" {

Error: error applying jobspec: Put "http://18.181.17.14:4646/v1/jobs": dial tcp 18.181.17.14:4646: i/o timeout

  on nomad.tf line 13, in resource "nomad_job" "plugin-ebs-nodes":
  13: resource "nomad_job" "plugin-ebs-nodes" {

Error: error registering volume: Put "http://18.181.17.14:4646/v1/volume/csi/mysql?namespace=default": dial tcp 18.181.17.14:4646: i/o timeout

  on nomad.tf line 27, in resource "nomad_volume" "mysql_volume":
  27: resource "nomad_volume" "mysql_volume" {